Gas-engine.



Patented May 27, 1913 2 SHEETS-SHEET 1.

61 Hon 10,1

's. J. WEBB. GAS ENGINE.

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BY mnnnrmnon AND BY mnsm: nssienmnnrs, ownnn or 'Trrnn Specification (if were mm, A, Application filed Qctober 30,-1%?02. ms. B5 428.

ToaZZ whomit may concerlib V Be it known-that 1,.SAM'UEL 'J.-WEBB, a citizen of the United. States, residing at Minden, in the parish of Webster" and State of Louisiana, have invented certain new and useful Improvements in Gas-Engines, of" which the following is a specification. My invention relates to gas engines and' consists of means for compressing and (admitting the charge to the working cylinder, for starting the engine and for preventing the cranks from stopping on a dead center, 'and of certain details of construction fully described hereinafter and shown in thesecompanying drawing, inwhich': f Figure 1 is a sectional elevation of a gas engine illustrating my improvements; Fig. 2 a side elevation; Fig. 3 a sectional elevation of an engineshowing the parts differ ently arranged; and Fig. 4a part sectional side elevation of Fig. 3;

There are two cylinders A and B, the cvl-' inder A being the power or working cylin er and the cylinder B being the compression :5 cylinder. The cylinders have pistons 1, 2, connected to cranks C, C at less than ri ht angles to each other on the crank shaft the connection being such that when the piston 1 is at so the upper end of its stroke the ascending piston 2 will-havev completed about three w fourths of its stroke.

r With the cylinder B communicate two ports oneclosed by a valve 3 opening in ward, and the other by a valve 4 opening outward, he port of the valve 3 con1muni-- cating with a chamber or passage-w, to, which a proper explosive mixture passes from any suitable carbureter or air and gas 40 mixing device so'that as the piston 2 descends the charge will be drawn into the cylinder B. As the piston 2 descends the valve 3 will be opened against a spring 5 and the valve 4 is normally closed by a '45 spring 6, and-will lift on the ascent of the piston 2, after'the pressure in the cylinder B is. sufficient to overcome said spring, and all the mixture to be forced into the chamber y above the cylinder A, the piston of which is also rising. The piston 1 is of greater diameter than the piston 2, and the I cylinder A has an exhaust port closed by a Y valve 7, seated by a spring 8 and positively opened on the upstroke of the piston 1 after 5 its power stroke as described hereinafter..

driven from the cylinder B and compressed practically meetsthe. head of the'f cylinder 'hanst gases. It willhe seenthat" lie on operates as a two-eycle engine In the head ofthe cylinder an alsoa port communicating with the chamber 1) a closed by a valve 10 which is also opened positively. 1

' f The charge sen es, ams-ass in the chamber 3/ may beexpioded in any suitable manner either .by a spark orhy an. mean-1 descent blo k H, in a casing 12 esshown, and as fully set forth in my application for LettersPatenFSeriai No; 129,429. As thcfgaw piston 1 reaches the limit ofits upward moi, tion the piston 2 *is in the act of rising and as itcompletes its movement the charge is I,

in the chamber 3/ and casing 12, and the w valve 10 is positively opened and the charge; 5 ignited, driving the iston 1 downward? On the return stroke 0 the piston '1' the exe. haust valve 7 is opened and thevalve lfl is closed to prevent m ssage jvvhioh isth'en T l1 being compressed by I the upwardly moving, piston Qfrom passing to the'cylinder A, the valve 7 being. held open until the piston 1 completely expelling the whole ofQtheex ich 1 'I. make nsej of compressed air w troduced into the cylinder A tostiit the] gine and Iprefer' to make usef oftheeyliii 'eo i der B as a pump to secure a'supply g m-g:

pressed air, which iS-Sfififtl, in a rem-war 1' tank 1) when, as in theca'se of s t-sewing motor on a vehicle the pistonfi I as the vehicle runs one down grade-f 90.

a stationary engine the pumping action be'obtained by suddenly entting'ofifthelg as I or .oil "supply and pumping an the engine runs-by momentum; V

provided wherehylthe valves '1 nae-=10 be prevented from openi evehif'the, shaft C rotates, such devices being bestshown'in FlgS.18J1d2.: I i The shaft ,22 is provided with 'camsfor positively opening the valves- T and 10 at ,f proper positions of said shaftand has at the end a crank pin 40, which extends into a'block in the slot of a link 25 which is centrally pivoted at w to'afswinging arm 4 3 swingmg'onthe shaft C and provided with a handleiwhereby it may be swung so as to I carry the link upon the said block to bring the-latter to either end of the slot inthe link. The link at the'left-hand end, Fig, 2,

is provided with ears for receiving. a de- 1:

tachable pin 43, passing through the upper end of the rod 26, having at the lower end a strap inclosing an eccentric 24 on the shaft C. When'the parts are in the position shown in Fig, 2, the rotation of the shaft and movement of its eccentric will impart an up and down movement to the rod 26 and to the lefthand end hit the link and rock the shaft 22. By swinging the arm 43 to the left so that the block of the pin will be opposite pin on, the vertical up and down movement of the leithand end of the latter will be effected asbefore, but the block in the slotwhen the air is not to be pumped. When air alone is admitted to the cylinder B, by the opening at the valve 3 it will pass on the up stroke of the piston 2 into the chamber y, and to the'ta'nk. To then start the engine it is only sem n-y to open said valve 20 and admitair to the cylinder A. It will be understood that the air may be stored in the tank D. by means ot an auxiliary pump or otherwise.

In the construction shown in Si s. 3 and 4, the cylinder B is at an angle to t e cylinder A; and the valves are shown somewhat differently arranged but the operationis the same; In each case there is the rock shaft 22 with cams operating on the valves to be lifted,said shaft being rocked from an cccentric 24 on-the crank shaft with a reversing link 25 as in my application for Letters Patent Serial No; 185,383,15 shifting the said linlc The valve l0 -may be opened either after the! piston 1 reaches its upper position so that its will be driven downward to rotate the shaft in one direction, or it may be opened before the piston reaches its upper position and the explosion will drive it downward to reverse the direction of movement of the shaft. In this construction a a pipe 26' contains the chamber y" and the air tank I) communicates with said pipe. In Fig. 4 is shown a valve casin' E with peculiar valves controlling the oi? and air ports as set forth in my application for Letters Iatent Serial No. 129,429.

The compressed air maybe admitted to the casing F through a pipe 71 communicating with the air vessel D. When the piston 2 is used as an air pump only, the engine may operate an oil pump I from which oil may be pumped through a nozzle s into the chamber y to mix with the inflowing air and form the explosive mixture.

Since the cranks C are set at an angle to each other and since the crank casing is closed and air-tight, when one of the cranks is on dead center, the turning moment of its piston is zero, while the turning moment of the other piston is greater than zero. It

will be therefore seen that the engine can never stop on dead center. The tank D in Figs. 1 or 3 is arranged to receive compressed air as when the engine is running down grade or this may be accomplished by opening the valves .20 between the combustion chamber and the tank D, cutting off the oil supply. Now in view of the fact that the turning moment due to the power and con pressor pistons is different at any instant, i the power piston should be on dead center, it may be difiicult to start the engine by the compressed air arrangement, but if air be admitted to the crank case when the power piston is On dead center the pressure of the air against the compressor piston which has the greatest turning moment will move the power piston oil of dead center and in the right direction, since the crank rotates clockwise in Fig. 3. After the power piston has been moved off of dead center, it will be easy to now start it by admitting air above the piston through the valve 10 as previously described.

A. torch 41, as shown in my companion ap' plication, is indicated in Fig. 2, as a preferred means of heating the igniter 40*. This igniter is supplemental to the igniter H and is made use of'to start the engine in the first-instance. After the engine has run for .a short time the igniter or block H becomes suficiently hot tolgnite the charge, when theuse of the supplemental igniter 40 may be discontinued. Y

It will be understood that .where I have referred to the use of oil, gas. may-be substituted therefor. I do not here claim any of the features shown, and also shown and claimed in my aforesaid-applications.

Without limiting myself to the construction shown, I claim:

1. In a gas engine, in combination, a working or power cylinder, a compressor cylinder, an explosion chamber connecting the cylinders, pistons for said cylinders, a

crank shaft connected to said. pistons having cranks set at an angle,'the power crank being in advance of the compressor crank, a check valve between the compressor cylinder and explosion chamber, and a valve between the power cylinder and the explosion chamber. 4

2. The combination with the compression cylinder and piston and working cylinder and piston, of a casing containing an explosion chamber, ports between the said chaman exhaust port and'valve 7 for said working cylinder, and means for positively open mg the latter, an inlet port for the compression cylinder, an air vessel D communicating with the explosion chamber through a channel provided with a valve and also communicating with tlie'inner or crank shaffi ends of the cylinders and devices whereby to shift said opening means for opening valves 7 and 10 so that said valves are not opened. 3. In a gas engine, in combination, a Working or power cylinder, a compressor cylincler, an explosion chamber connecting the cylinders, pistons for said cylinders, s 'crank shaft connected to said pistons having cranks set et an angle, the power crank beingjn advance of the compressor-crank, valves between the cylinders and explosion chamber, and an inclosecl a'intight crank case opening into the crank ends of the cylinders.

' 4. In a gas engine, in combination, aworkingor ,power cylinder, a compressor cylinclei', an explosion chamber connecting the cylinders, pistons for said cylinders, a crank shaftconnectecl to saicl pistons having cranks set at; an angle, 'lie power crank being in advance of the compressor crank, a check valve between the compressor cylinder and explosion clminbeifand a positively operated valve between the, power cylinder and ,the explosion climnbei:

In testimony whereof I have signed my name to this specification in "he presence of two subscribing Witnesses.

- SAMUEL J. WEBB.

Witnesses H. M. GILLMAN, 51;, W. CLARENCE DUVALL. 

